Drawing-press.



W. H. WELGH.

DRAWING PRESS.

APPLICATION FILED AUG. s, 1913.

1,1 1 1,000, Patented Sept. 15, 1914.

4 SHEETS-SHEET 1.

Elwuwwtox f l o Mimi. W616i W. H. WELGH. DRAWING PRESS. APPLICATIONFILED AUG. 8, 1913.

Patented Sept. 15, 19145.

4 SHEETS-SHEET 2.

W. H. WBLUH. DRAWING PRESS. APPLICATION FILED AUG. s, 1913.

Patented Sept. 15, 19M.

4 SHEETS-SHEET 4.

LIHLQQQD awe/whoa;

W2 1i Mam lmm Parana ornrcn.

WILLIAM H. WELCH, 0F CLEVELAND,

OHIO, ASSIGNOR TO THE CLEVELAND MACHINE vitlVI ANUFACTURING COMPANY, OFCLEVELAND, OHIO, A CORPORATION OF OHIO.

DRAWING-PRESS.

Specification of Letters Patent.

Patented @ept. 15,, 1191141.

Application filed August 8, 1913. Serial No. 783,732.

for drawing sheet metal, into deep dies in forming pans, basins, cancovers, and the like,

and wherein the blank or sheet to be operated upon is placed over themouth of the die and there held by an annular clamp or blank holderwhile the plunger descends within the annular holder and forces thesheet metal into the lower die, thus stamping it or drawing it into thedesired form. These actions therefore require that the blank holdershould first descend forcibly the stamped article and leave against themargin of the blank and, there pause or dwell, holding the blank firmlyupon the die, while the plunger continues to descend within the holderand forces or draws the metal of the blank into the die, thus impartingthe proper shape thereto. The holder still remains in its holdingposition during the up-stroke until the plunger is withdrawn, when theblank holder rises with it to release and permit the removal of thepress ready to receive the next blank. As generally constructed, thesepresses are provided with but a single blank holder that in large orheavy stampings requiring several impulses or successivestamping anddrawings operations, several presses are required, and where thestamping is required to be heated,

it is necessary to re-heat the blank or partially completed stampingbe-. tween the successive drawing operations, thus impeding the work ofcompleting the final article and perhaps impairing the quality of'thefinal finished product.

Theprimary object of this invention is to provide a generally improveddrawing or stamping press, of this class, having a plurality of blankholders and plungers con; veniently arranged whereby a successive numberof drawing'orstamping operations may be performed on a single press andwithout re-heating the blankor 5 partially completed stamping betweenthe in Drawingwhich is used and plunger, so

bers 2 plural and operations or impulses of the press as above referredto.

With the above mentioned and other obects in view, the inventionconsists in the novel construction, arrangement and com bination ofparts, hereinafter described, illustrated in some of its embodiments inthe accompanying drawings, and particularly pointed out in the appendedclaims.

Referring to the drawings, forming a part of this specification, Figure1, is a view of the improved press partly in front elevation and partlyin vertical section, "the blank holders and plungers being at the bottomof their stroke. Fig. 2, a vertical sectional .view, taken on line 22 ofFig. 1, the plunger shown being elevated by. a one-quarter revolution ofthe crank shaft. Fig. 3, a horizontal sectional view taken on line 33 ofFig. 1. Fig. l, a horizontal sectional view taken on line 44l of Fig. 1.Figs. 5, 6, 7, and 8, are diagrammatic views showing the parts in theirdifferent successive positions to illustrate different relativepositions of the respective blank. holders and plungers and theiractuating mechanism. Fig. 9, a horizontal sectional view of a modifiedform taken on the general line indicated by line 3-3 of Fig. l, in whichmodification two separate and distinct cross heads or slides areprovided, as distinguished from the single slide or cross head as shownin Fig. 3.

Similar numerals of like parts drawings. The improved machine comprisesa suitreference designate throughout all the figures of the able'base 1,upon which is mounted a fixed frame 2, forming the bearing for theworking parts, said fixed frame being provided with a bed or platen 2,adapted to receiveand carry the stationary or female dies The stationarydies 3, may be removably mounted upon the bed or platen 2*, by means ofbolts 3 adapted to be removably mounted in the IT-slots 3", of the bed2. The blank holder slide or cross head l, is slidably mounted betweenthe side or upright memof the frame by means of vertical guide members2,forming guide or slideways for receiving and containing suitably shapedvertical guide members 4, at the ends, of the blank holder slide orcross head 4.

' As a means for carrying and reciprocating the slide orv cross head 4,the latter is provided with guide lugs 4", at the front and rear sidesthereof, said guide lugs being connected to connecting or toggle links5. The links 5, are connected to crank or lever arms 6 projecting fromand carried, by rock shafts 6, mounted in suitable bearings at the upperpart of the frame of the machine and on opposite sidessthereof.

' The shafts 6, are provided at their ends with crank arms 6", connectedto link members 7, the latter being connected to lugs .8,

of a cross head or slide 8, said slide 8, being adapted to reciprocatein a vertical direction upon a vertical guide 9, suitably mounted at oneend of the frame. The slide or cross head 8, is adapted to bereciprocated by means of a connecting arm 10, said arm 10, being.suitably connected at one end to the slide 8, and at the other to acrank arm 11*, of the driving or crank shaft 11. The crank shaft 11, isprovided with cranks 11 I carrying pitmans of connecting arms 12, the

holder frames 13*, by means of securing 4 bolts 13.

The plunger frames 15, are adapted to reciprocate within the blankholder frames 13, through the medium of the pitman or connecting arms12, to which latter they are adjustably connected through the adjustableconnecting bolts 16, and internally threaded connecting members 16.

The plungers or male dies 15, are removably connected to and carried bythe plunger frames 15, and may be secured to the latter in any suitableand convenient manner, as for example,by means of key members 17 asillustrated in Fig. l of the drawings. The plungers or male dies 15, areadapted to reciprocate within the blank holders 13, and in properrelative relation thereto, as illustrated in Figs. 5 to 8 of the draw-.ings, said plungers or dies 15, being of suitable form to conform tothe subjacent stationary dies 3, in accordance with the operations uponand final form to be given to the stamping, as illustrated in Fig. 1, ofthe drawings.

In the operation of stamping heavy sheet metal articles, the blank 18',may be first heated or annealed, and when the blank holders and plungersare in their uppermost position, as indicated in Fig. 8, of the drawingsthe operator or workman will place the v blank above the right-handfixed or stationary. die so that when the corresponding or cooperatingblank holder and plunger are i brought down during the working impulseor stroke of the machine, the blank 18,Will be given its first orinitial form, as illus trated at the right-hand side of Fig. 1, of thedrawings, and when the blank holder and plunger have moved upwardly torelease the partially formed stamping, the latter may be moved to thenext or left-hand die for the next or successive operation and at thesame time the operator or attendant may place a new blank abovetheright-hand die so that as the blank holders and plungers are simul-.

taneously given their downward strokes, the

two blanks will be simultaneously operated upon, thus clearly increasingthe speed and expediting the stamping operation and without againheating or annealing the blank in the successive stamping operationsillustrated in' Fig. 1, of the drawings. In passing the partially formedblank from the first or right-hand set of dies to the second orleft-hand set of dies, the workman or attendant may dip the partiallyformed blank .in the oil of the oil container or receptacle 19,conveniently located upon the bed or platen 2 for this purpose, as shownin Figs. 1 and 2, of the drawings.

If desired, a plurality or pair of cross heads 4, may be mounted in theframe 2, as illustrated 1n Fig. 9, of the drawings, in which instance,the connecting or toggle links 5, may be arranged in pairs as thereshown, and each slide or cross head 4:, separated by a partitioningmember or intermediate guide 2 extending between the side members of themain frame 2.

From the foregoing description, taken in connection with theaccompanying drawings, the operation and advantages of my invention willbe readily understood.

Having thus described some of the embodiments of my invention, what Iclaim and desire to secure by Letters Patent is,

1. In a drawing press, a compound blank holder slide consisting of amain slide, and a plurality of independent auxiliary slides adjustablymounted therein.

2. In a drawing press, a compound blank holder slide consisting of amain slide, blank holder frames mounted therein, and blank holdersdetachably connected to said blank holder frames.

- 3. In a drawing press, a blank holder I slide, a plurality of blankholder frames ad- 'ustably mounted therein, and a plurality of blankholders detachably carried by said blank holder frames beneath saidblank holder slide.

4. In a drawing press, a compound blank holder slide or cross headconsisting of a main slide, hollow blank holder frames adarraoeojustably mounted therein, blank holders detachably connected to saidframes, and pluners mounted within said blank holder frames and blankholders.

5. In a drawing press, a frame, a blank holder cross head shdabl mountedtherein blank holder frames justably mounted within said cross head,blank holders carried b said frames beneath said cross head and p ungerframes and plungers mounted in and adapted to reciprocate within thesaid blank holder frames and blank holders respectively.

6. In a drawing press, a blank holder cross head provided withvertically extending bearing openings, hollow blank holder framesadjustably mounted in said bearing openings, hollow blank holdersdetachably connected to said frames, and plunger frames and plungersslidably mounted in said blank holder frames and blank holdersrespectively.

7. In a drawing press, a main frame, a crank shaft, toggle linkmechanism connected to the latter, a plurality of lungers connected tosaid crank shaft, a blan holder cross head connected to said toggle linkmechanism, and hollow blank holders ad'- justably mounted within saidblank holder crosshead and surrounding said plungers.

8. In a drawing press, a blank holder slide or cross head provided withhearing openings and having laterally extending guide lugs, hollow blankholder frames mounted in said bearing openings and projecting beneathsaid cross head, adjusting bolts connected to the frames and extendlngthrough said guide lugs, and hollow bla holders gletachably connected tosaid blank holder ames.

9. In a drawing press, a main frame, a, mechanism concrank shaft, togglew. nected to the latter, a plurality of plungers connected to said crankshaft, and a compound blank holder slide consistin of a main slideconnected to said to g e link mechanism and a plurality of ho ow independent auxiliary slides mounted within and adjustably connected to'saidmain slide and surroundmg said plungers.

10. In a drawing ress, a main frame, a crank shaft, a main ide, aplurality of auxiliary blankholder slides in ependently and adjustablymounted therein, and a plurality of plunger members mounted invsa1dauxiliary blankholder slides and adjustably connected to said crankshaft.

11. In a drawing press, a main frame, a crank shaft, toggle linkmechanism connected therewith, a blank holder cross head carried by saidto gle link mechanism, hollow blank holder afmes and blank holdersmounted in said blank holder cross head,

WILLIAM II. WELCII.

Witnesses BN7 S. PIERCE

